books.google.gr - In the 780s northern Britain was dominated by two great kingdoms; Pictavia, centred in north-eastern Scotland and Northumbria which straddled the modern Anglo-Scottish border. Within a hundred years both of these kingdoms had been thrown into chaos by the onslaught of the Vikings and within two hundred...https://books.google.gr/books/about/From_Pictland_to_Alba.html?id=7d1SP6ztlq0C&utm_source=gb-gplus-shareFrom Pictland to Alba